Gagnon Site Services

Good 5.0 (11 reviews)

Henniker
Warranties Offered
Green Roof
Asphalt Shingle Roof
Flat Roof
Hip Roof

Website —

Phone Show phone number

Hours

Mon7:30 AM - 9:00 PM

Tue7:30 AM - 9:00 PM

Wed7:30 AM - 9:00 PM

Thu7:30 AM - 9:00 PM

Fri7:30 AM - 9:00 PM

Sat7:30 AM - 9:00 PM

Sun7:30 AM - 9:00 PM

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About the Business

At Gagnon Site Services, located in Henniker, New Hampshire, we pride ourselves on our versatility and technical expertise in roofing solutions. Our comprehensive range of services includes roof installation, replacement, deck repair, gutter installation and cleaning, as well as specialized green roofing services. We are equipped to handle both residential and commercial projects, ensuring that each job is completed with the utmost attention to detail and organization. Our dedicated team approaches every project with a commitment to delivering durable, high-quality results. We understand the complexities involved in roofing and gutter systems, and we manage these intricacies from start to finish. Our focus on meticulous workmanship and effective communication guarantees that our clients receive not only beautiful roofs but also long-term value. Whether you are in Henniker or the surrounding regions, you can trust us to coordinate complex jobs thoroughly, ensuring your peace of mind throughout the process.

What people say about “Gagnon Site Services”?

The majority of customer reviews reflect a highly positive sentiment towards the company's services, particularly highlighting professionalism, quality workmanship, and effective communication throughout projects. Customers appreciate the attention to detail and the efficiency of the crews, with many mentioning the thorough cleanup after work was completed. Communication is frequently praised, as customers felt well-informed and supported during the installation process. Overall, the consistent satisfaction expressed by customers indicates a strong reputation for reliability and quality in roofing services.

What Users Like The Most

Crew was extremely professional and efficient working on our roof.
The whole roof looks beautiful and durable. Great communication throughout the project.
We can't thank the Gagnon team enough for their amazing work on our new roof.
Communication was excellent with genuine care for timeliness and accuracy of the job.
The new roof looks just amazing, very well done.

What Users Like The Least

Customers are fully satisfied

Services: Roof Installation Roof Replacement Roof Deck Repair Gutter Installation Roof Gutter Repair Gutter Cleaning Gutter Companies Services Roof Cleaning Green Roofing Services

Recommended Reviews

Overall Company Rating

Excellent 5.0

Out of 11 reviews

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Your Review of Gagnon Site Services

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Mike Galvin

Google review

Jul 28, 2025

Crew was extremely professional and efficient working on our roof. It was a pleasure working with them. The quality of workmanship was very high.

Jeremy Robbins

Google review

May 3, 2025

Rob‘s crew did expert quality work on my new metal roof. Some dormers in the design involved intricate details as part of the installation, and it was done carefully and properly. The whole roof looks beautiful and durable. Great communication throughout the project. Putting in 24 gauge metal is an investment that will pay off in the long run, but having quality installation is key. I was 100% satisfied and would highly recommend.

Leigh Myers

Google review

May 3, 2024

We can't thank the Gagnon team enough for their amazing work on our new roof. They were efficient, polite and meticulous in the work that they turned out. I was worried about debris with our toddler and dogs, but there was not one nail left behind. It's hard to find good, honest workers that you can trust, but this entire team showed how a job should be done. We will definitely be calling them for our future needs! Thank you guys so much!!

Yasser Wakim

Google review

Aug 28, 2023

Rob and his crew came to our home in Grafton and did a great job. Great attention to detail and our wants for the project. We would love to have them back! Great all around experience!

Michael Nicastro

Google review

Aug 24, 2023

I highly recommend working with Bob and team. They are ultra professional, with high attention to detail (just look at the clean roofing lines in the photos) and exceptional, real-time cleanup. Communication was excellent with genuine care for timeliness and accuracy of the job.

Xiangyu Liu

Google review

Aug 3, 2023

I used Bobby's crew to install my new metal roof. They are very professional and easy to work with.

I asked them many questions throughout the entire process and they are always very patient in answering and explaining.

When they were tearing down the old roof, the debris broke one shutter panel. They immediately let me know before I discovered it myself and fixed it. If I noticed anything that they missed, Bobby was very responsive when I asked him to touch up those small details. Really appreciate the honesty and professionalism.

The new roof looks just amazing, very well done. Extremely satisfied with their workmanship and the final product. Highly recommended.

Erik Swenson

Google review

Apr 18, 2023

Great priced roof installed promptly with accurate commitments, completed in a day. Good crew and honest guys to work with. Would certainly recommend and do business again!

Barker Torrey

Google review

Mar 30, 2023

Team did outstanding job. Done in one day. Totally fixed my roof two days after tree was removed. Left property cleaned up and that was tough I had three feet of snow. These folks put my new metal roof on only a few months before the storm. They will always have my business I owe them big time just for the damage they prevented.

Travis Smith

Google review

Mar 3, 2023

Everything from beginning to end of our project was handled totally to our satisfaction. Interaction with staff and crew of workers was pleasant and professional. Quality of materials exceeded our expectation. Thank You Gagnon Site Services!

Walker Hartz

Google review

Sep 24, 2022

Really good customer service. They were responsive and professional. The quality of work (siding and windows) was excellent. Would definitely recommend using them!

kasandra rivera

Google review

Aug 24, 2022

Such an amazing team!!!
We got our roof done and we are so happy with how it came out. The team was professional and customer service was amazing. I especially like that they are bilingual and how the team made sure they cleaned up after them selves before they left. (Thank you so much for that) I would definitely recommend them to anyone who needs a roof redone or even just looked at thank you guys once again for your quality work I will definitely be keeping your contact info

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